| Chasmops marginatus Kukruse Level, Alexeevka Quarry St. Petersburg, Russia Size: The trilobite is partially enrolled. A bit of the cephalon and tip of pygidium are missing. See photos for size as it is difficult to measure accurately. Price: $150 US | 
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| Chasmops marginatus Kukruse Level, Alexeevka Quarry St. Petersburg, Russia Size: The trilobite is partially enrolled. A bit of the cephalon and tip of pygidium are missing. See photos for size as it is difficult to measure accurately. Price: $150 US |
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